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Caffeine Supplementation and Strength Endurance in Brazilian Jiu-jitsu Athletes

NCT07479875 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 15

Last updated 2026-03-18

No results posted yet for this study

Summary

This study investigated the acute effects of ingesting 400 mg of caffeine administered 30 minutes before Brazilian jiu-jitsu-specific strength endurance tests. Experienced athletes completed two conditions, placebo and caffeine, in a randomized, double-blind, crossover clinical trial. Performance was assessed using the dynamic component of the kimono grip strength test (maximum number of repetitions, MNR) and the isometric component (maximum static lift, MSL), both performed with a gi grip. Rating of perceived exertion, adverse effects, and blinding effectiveness were also evaluated.

Conditions

  • Muscle Strength
  • Physical Endurance
  • Exercise

Interventions

DIETARY_SUPPLEMENT

Caffeine

Capsule containing 400 mg of anhydrous caffeine ingested 30 minutes before performance testing.

OTHER

Placebo

Capsule containing 400 mg of cornstarch used as placebo, ingested 30 minutes before performance testing.

Sponsors & Collaborators

  • Coordenação de Aperfeiçoamento de Pessoal de Nível Superior.

    collaborator OTHER_GOV

  • Federal University of Minas Gerais

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
TRIPLE
Model
CROSSOVER

Eligibility

Min Age
18 Years
Max Age
35 Years
Sex
MALE
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2025-12-12
Primary Completion
2026-01-15
Completion
2026-01-15

Countries

  • Brazil

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07479875 on ClinicalTrials.gov